from: Words to Eat By
2 T soft butter or margarine, plus more for topping
2 T flour
½ t salt
1/8 t pepper
½ t mustard powder (optional, this gives it a little bite)
2 cups hot milk (take it off the heat just before it boils)
1 ½ cups diced cheddar cheese
12 oz elbow macaroni, cooked al dente
½ cup fresh bread crumbs
Preheat oven to 350. Spray a 2-quart baking dish with cooking spray and set aside.
Put butter or marg, flour, salt, pepper, and hot milk into blender container. Press low button, then high for 40 seconds. After 20 seconds, gradually add cheese. Mix with macaroni, and empty all into the prepared baking dish. Sprinkle with bread crumbs and dot with additional butter or margarine. Bake for 30 minutes, until bread crumbs are nicely browned and cheese sauce is bubbling.